Polyurethane O-Rings - Cast Urethane O-Rings
General Polyurethane O-Rings Description:
Polyurethane rubber is a thermoplastic elastomer formed by reacting a polyol with a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives. Polyurethane rubber is widely used due to its high strength, and excellent tear and abrasion resistance. Polyurethane also provides excellent permeation resistance.
| Recommended Use | Not Recommended For | Mechanical Properties |
|---|---|---|
| Drive Belts Some Petroleum Oils Some Hydrocarbon Fuels Oxygen / Ozone | Ketones (MEK) Acids Auto / Aircraft Brake Fluids Chlorinated Hydrocarbons Water | Excellent Wear Resistance Poor Compression Set Resistance Excellent Short-Term Resilience |
Popular Polyurethane O-Rings Compounds:
Hundreds more specialty compounds available. Contact a Marco Sales Consultant or Engineer for more information.
| Marco CPD# | Datasheet | Color | Duro (Shore A) | Relative Price | Typical Inventory Level | High Temp (F) | Low Temp (F) | Features |
|---|---|---|---|---|---|---|---|---|
| Translucent | 70 |  | Med | 250 | -65 | High performance 70 durometer Polyurethane | ||
| Translucent | 90 | | Med | 250 | -65 | High performance 90 durometer Polyurethane | ||
| Translucent | 90 |  | Med | 180 | -30 | General purpose 90 durometer Polyurethane | ||
| Translucent | 70 | | Med | 180 | -30 | General purpose 70 durometer Polyurethane |
Polyurethane O-Rings Temperature Range:
The temperature ranges presented above are approximations for dry air service only and should not be used to determine design specifications or end-use temperature limits. Actual temperature range of a compound in an end-use application is highly dependent on part type, hardware configuration, applied forces, chemical media, pressure and thermal cycling effects, and other factors. The most practical way of determining an end-use temperature range is testing in the actual application conditions. Consult a Marco Engineer for more details.
Common Names:
Urethane, AU, EU, PU
Trade Names:
Adiprene®, Millathane®, Vibrathane®
Polyurethane Rubber O-Rings Features:
- Good hydraulic oil and gasoline resistance
- Resistant to pure aliphatic hydrocarbons (propane, butane, fuel)
- Resistance to mineral and silicone oils and greases
- Resistant to water, oxygen, ozone and aging
- Excellent tear and abrasion resistance
- Available in multiple types and compounds to meet performance and cost requirements
Polyurethane Rubber O-Rings Limitations:
- Not compatible with acids, ketones, esters, ethers, alcohols, glycols
- Hot water, steam, alkalis and amines